Global Patent Index - EP 2816238 A4

EP 2816238 A4 20150304 - CYLINDER DEVICE HAVING POWER ASSIST MECHANISM

Title (en)

CYLINDER DEVICE HAVING POWER ASSIST MECHANISM

Title (de)

ZYLINDERVORRICHTUNG MIT ANGETRIEBENEM HILFSMECHANISMUS

Title (fr)

ENSEMBLE CYLINDRE DOTÉ D'UN MÉCANISME D'ASSISTANCE

Publication

EP 2816238 A4 20150304 (EN)

Application

EP 13748942 A 20130212

Priority

  • JP 2012049765 A 20120216
  • JP 2013053219 W 20130212

Abstract (en)

[origin: EP2816238A1] An output rod (27) is inserted in a housing (4) so as to be movable vertically. A first piston (41) inserted in a lower part of the housing (4) is fixed to the output rod (27). A second piston (42) inserted on an upper side of the first piston (41) is fitted on the output rod (27) so as to be movable vertically. A lock chamber (44) is provided between the first piston (41) and the second piston (42). A first release chamber (51) is provided below the first piston (41). A second release chamber (52) is provided above the second piston (42). During force multiplication driving of the output rod (27), a pressurized fluid in the lock chamber (44) carries out the force multiplication driving with respect to the output rod (27) downward via the second piston (42) and engaging balls (69). A retaining spring (60) which biases the second piston (42) upward is provided in the lock chamber (44) between the first piston (41) and the second piston (42).

IPC 8 full level

F15B 15/14 (2006.01); B23Q 3/06 (2006.01)

CPC (source: EP KR US)

B23Q 1/0081 (2013.01 - EP KR US); B23Q 1/009 (2013.01 - EP KR US); B23Q 3/082 (2013.01 - KR); F15B 15/1409 (2013.01 - EP KR US); F15B 15/204 (2013.01 - EP KR US); F16J 1/005 (2013.01 - KR US); F16J 10/02 (2013.01 - KR US)

Citation (search report)

  • No further relevant documents disclosed
  • See references of WO 2013122039A1

Designated contracting state (EPC)

AL AT BE BG CH CY CZ DE DK EE ES FI FR GB GR HR HU IE IS IT LI LT LU LV MC MK MT NL NO PL PT RO RS SE SI SK SM TR

Designated extension state (EPC)

BA ME

DOCDB simple family (publication)

EP 2816238 A1 20141224; EP 2816238 A4 20150304; EP 2816238 B1 20160210; CN 104105890 A 20141015; CN 104105890 B 20160224; JP 5390047 B1 20140115; JP WO2013122039 A1 20150511; KR 101653895 B1 20160902; KR 20140105589 A 20140901; US 2015000516 A1 20150101; US 9541194 B2 20170110; WO 2013122039 A1 20130822

DOCDB simple family (application)

EP 13748942 A 20130212; CN 201380009015 A 20130212; JP 2013053219 W 20130212; JP 2013525471 A 20130212; KR 20147020018 A 20130212; US 201314372873 A 20130212